Work holder for gauge lapping machines



5 6! AQM. DRAKE 2, 6

WORKHOLDER FOR GAUGE LAPPING MACHINES Filed July 20, 1942 Patented Aug. 6, 1946 l sei if" 7 HQLPERF arie LAI-Pmo s H c mfifiq l Y "Alden M; Drake, West'Hartford ,'Gonn., assignorto' Niles-Beinent londiCompany, West Hartford,. Conn, a corporation of New.- Jerseyv l Ann i a i n u r 20. 1942... sen in estate:

This ntion relates. to; gau e. ho de s. n particularly: to a holder for a, tapered. screw threadgau e whilebeinglapp d.

An objectof the. invention. is to provide a suit-. able. holder for a gauge of the above referred to typ While being lappedjenabling the angularposition of the gauge relative, to the body portion of the holder to bereadily adjusted.

M r pa tic larly the. holder. is. desi ned for s lid screw, thread gauges haying internal tapered threads, means being provided so that the rota: tive. position. of the gauge within the holder may be. arma l-y adjustable durin the lapp n ope ation.

Another object of. the invention'is to. provide simplev manually operated means. for angularly varying theposition of the, gauge within the holder, and. to. provide frictional. means to retain the gau e. in: its. successive angularly adjusted positions; j

With. the, above. and other objects in view the invention may. include the features of construction operation set forth in the following specification and. illustrated. inthe accompanying d awing- I .i-

In the: accompanying drawingfannexed hereto and forming. a part, of this. specification, I. have shown the inventionin a. holder fo @taper screw threadgauge of the olid ring type, butfit'w-illbe understood: that the. invention can be otherwise embodied and that the drawing is not to be construed asdefin g. or limiting the scopa r the invention, thev claims. appended; to this specification being relied upon for that purpose. thedrawing: Y

Fi u l s a iren e eva o a. sauseh ld made in c ordance with t re en invention, parts being brokenaway substantially on the line ll of Fig. 2 to more clearly show the interior construction.

Fig. 2 is a transverse central sectional view of the holder and gauge shown in Fig. 1, and

Fig. 3 is a fragmentary view of the frictional retaining means employed in the gauge holder, parts being broken away to more clearly show their construction.

In the above-mentioned drawing there has been shown but one embodiment of the invention which is now deemed preferable, but it is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly and in its preferred aspect the invention may include the following principal parts:

4 Claims. (Cl; 51'2'17) irst; a body member-havingan arm preferably formed integrally thereon and extending radi-,. ally therefrom second, a rotatable member havingportions housed within the body member. and adapted: to be angularly adjustable about the central axisot the holder; third, gauge clamping means provided on the rotatable member. enabling a gauge to be clamped thereto with its axis ali edf with the of rotation of the rotatable member; four'th; frictional retaining means for the rotatable-- member housed within the body member; fifth; a gear mounted on, and r0- tatable wtih the gauge'clamping member; and s xt a; i en" sup Withi h body member'and engaging the gear so that the 'pin n. merits-manu lly actua ed t y e neular posit n. of the rota able member relative to 1 hed 'mei be n ii em.-

R ferri g more in detailto the figures of the dra g I provide a gauge holder generally simar. in fo m t tha I QWIF in' my ratenftfor Screw thread lapping machine No. 2,335,745; ran ed Novembe 30 19 3. The pres gauge holder is sii'fnilar'to that disclosed in my earlier ic t on des n part cularly or ol pered screw thread gauges, which comprised a body member l0 having an arm I outstanding therefrom by means of which the entire holder l e os illated. A ear-es W was lamp within. a portion ofthe holder, but no means were provid'edfor conveniently advancing the gauge along the. lap. during the lapping operation and as the screw threads, increased in diameter. The present form of holder provides. means for varyins thev an l o ition f the gaug W du the progress of the lapping operation relative to t e b me b r I t h'e h ld r andt radial arm l l b'yi means oflwhich the. gauge maybe gradually advanced along the threaded lap to portions of increased diameter. As shown in the figures of the drawing the body member H) may comprise two members maintained in spaced relation to each other by suitable rivets 9.

Housed within a cylindrical recess in the body member I0 is a rotatable member [2. This rotatable member l2 has a portion l3 formed integrally therewith or welded thereto for receiving and clamping the gauge being lapped. As shown most clearly in Fig. 2, the gauge clamping portion of this rotatable member l2 comprises two semi-circular portions M which may be drawn together by means of a suitable screw t5 to firmly engage the periphery of the gauge. The clamping screw I5 is shown in Fig. 1, but has been removed in the showing of Fig. 2. When member l during operation a gear I6 is formed on or riveted to the rotatable member I2 concentric to its axis of rotation. In the drawing the gear is separate from the member l2 and is fastened thereto by rivets 23. ally bearing against a portionofthis rotatable member l2 are a plurality of spring pressed plungers l1 housed within recesses angularly d sposed within the body member Hi. Theseplungers I1 and their springs [8 may be retained in position by a ring 19 threaded on to the body' member 10. v

In order to rotate the member 12 to which the gauge W being lapped is attached a pinion 20 is rotatably mounted within the body member l0 upon a short shaft 2| extending in a direction parallel to the axis of rotation of the rotatable member I2. This pinion carrying shaft 2| is provided with a suitable handle 22 at its opposite end which may be actuated to manually rotate the pinion 20 and thereby; angularly adjust the gauge W relative to the holder l0 and its arm I I. In operation a gauge W is clamped within the clamping portion l3 of the rotatable member l2 and the gauge W is fitted over a tapered screw threaded lap as shown in the above referred to application. While so. mounted in position the holder, by means of its arm H, is oscillated through any predetermined angle by suitable actuating means such as those described in the above referred to application. th'e lapping Also friction- 41. rotatable member in successive adjusted positions, whereby a work piece secured to said rotatable member may be mounted for free adjustment on said spindle and manually advanced therealong.

2. A holder for work pieces on the lapping spindle of a lapping machine comprising incombination, a body member, amember centrally mounted for rotation therein, clamping means on said rotatable member for retaining an internally threaded work piece with its axis in alinement with the axis of rotation of said rotatable member, an actuating arm extending from said body a member whereby said holder and threaded work operation proceeds and the screw threads within 1 the gaugeW being lapped. increase in diameter the pinion shaft 2| may be rotated slightly to angularly advance thegauge W uponthe-lap to portions slightly increased in diameter so that the lapping can be continued progressively until the proper size of screwthreads' in the gauge is attained. What I claim is: a

1. A holder for work pieces on the lapping "spindle of a lapping machine comprisingin combination, a body member, 'a member mounted for rotation therein, work clamping means'on said rotatable member, an actuating farm extending from said body member whereby said holder may be oscillated during rotation of the lapping spin- 7..

dle, gear means to rotatably adjust said rotatable member relative to said body member, and means housed within said body member and frictionally engaging said rotatable member to retain said piece may-be oscillated during rotation of the lapping spindle, means to rotatably adjust said rotatable member relative to said body member, and means to frictionally retain said rotatable member in successive adjusted positions, whereby a work piece secured to said rotatable member may be mounted for free adjustment on said spindle and manually advanced therealongr 3. A holder for work pieces on the lapping spindle of a lapping machine comprising in combination, a body member, a member mounted for rotation therein, said body member and rotatable member having a central opening extending therethrough, work clamping means on said rotatable member, an actuating arm extendin from said body member whereby saidholder may be oscillated during rotation of the lapping spindle, gear means to rotatably adjust said rotatable member relative to said body member; and means housed within said body member and frictionally engaging said rotatable member to retain'said rotatable member in successive adjusted positions, whereby a work piece securedto said rotatable member may be mounted for free adjustment on said'spindle and manually advanced therealong.

4. A holder for work pieces on the lapping spindle of a lappin machine comprising in combination, a'body member, a, member centrally mounted for rotation therein, said body member and rotatable member having a centralvopeningextending therethrough, clamping means onsaid rotatable member .for retaining an internally threaded work piece with its axis in alinement with the axis of rotationof said rotatable member, an actuating arm extending fromsaid body member whereby said holder and threaded work piece maybe oscillated during rotation; of the lappingspindla'means to rotatably adjust said rotatable member relative to said body member, and means to frictionallyiretain said rotatable member in successive adjusted positions, whereby a, work piece secured to said rotatable member may be mounted for freeadjustment of said spindle and manually advanced therealong.

- g ALDEN-M. DRAKE. 

